CuO-gt; Cu-gt;CuCl2-gt;Cu(OH)2-gt;CuSO4

2CuO->2Cu+O2 Cu+2HCl->CuCl2+H2 CuCl2+2NaOH->Cu(OH)2+2NaCl Cu(OH)2+H2SO4->CuSO4+2H2O